Era4 is an ambitious UK start-up on a mission to help shape the country's AI future. We're transforming underused brownfield and former industrial sites into the digital infrastructure needed to power the next generation of technology.
We're at the beginning of an exciting journey, building a business that will help meet the UK's growing demand for AI infrastructure while bringing new investment and opportunities to the communities around us.
The opportunity:
We're looking for an energetic, highly organised and proactive Personal Assistant to support our Chief People Officer and our US-based Chief Technology Officer. You will play a central role in keeping two busy executives organised, anticipating what they need and making sure priorities, meetings and day-to-day activities run smoothly.
This is a varied and exciting role in a fast-moving, growing business. It will suit someone who thrives on pace and variety, thinks ahead, exercises sound judgement and takes a proactive approach to supporting senior executives. You'll be confident taking ownership, anticipating requirements and finding solutions, whether coordinating complex arrangements, responding to unexpected challenges or supporting the wider team.
What you'll be doing:
- Take ownership of two busy executive diaries, anticipating scheduling needs, resolving conflicts and protecting time for the most important priorities.
- Proactively manage inbox and correspondence priorities, spotting what requires attention, coordinating responses and following up on outstanding items.
- Organise meetings end-to-end across UK and US time zones, preparing agendas and materials, capturing key decisions and actions where required, and proactively following up on outstanding commitments.
- Coordinate domestic and international travel, accommodation and detailed itineraries, anticipating requirements and ensuring arrangements run smoothly.
- Build strong working relationships and act as a professional, approachable point of contact for internal and external stakeholders.
- Prepare, proofread and format high-quality presentations, documents, reports and spreadsheets as required.
- Manage executive expenses, invoices and other routine administrative processes, ensuring accurate records and timely processing.
- Maintain accurate records, shared documents and organised systems using Microsoft 365, SharePoint and other relevant tools, identifying opportunities to improve administrative processes and ways of working.
- Handle confidential business, technology and people-related information with discretion and sound judgement.
- Support day-to-day business operations by gathering and collating information, coordinating updates and preparing summaries or reports as required.
- Provide flexible administrative and coordination support to the wider team, including organising team meetings and events and taking ownership of additional responsibilities as required.
What you'll bring
- Experience in a PA, Executive Assistant or similar role, ideally supporting more than one senior leader.
- Outstanding organisational skills, with the ability to plan ahead, juggle competing demands and keep things on track in a fast-paced environment.
- A proactive, solutions-focused mindset, with the confidence to anticipate needs, exercise initiative and take ownership of responsibilities.
- Excellent attention to detail, follow-through and pride in producing accurate, polished work.
- Clear, confident written and verbal communication skills, with a warm and professional approach to working with others.
- Sound judgement, discretion and reliability when working with confidential information.
- Strong Microsoft 365 skills, particularly Outlook, Word, PowerPoint and Excel; experience with SharePoint is an advantage.
- Energy, adaptability and the flexibility to coordinate with a US-based executive, including occasional meetings or requests outside standard UK working hours.
Why join Era4?
Joining Era4 at such an early stage offers a unique opportunity to be part of an ambitious business as it grows and evolves.
This is a varied, fast-paced role with opportunities to take on a broad range of responsibilities as the business develops. For someone who brings energy, initiative and exceptional organisational skills, it's an exciting opportunity to make a real impact, build strong relationships across the business and become a valued part of the team.
Diversity & Inclusion
Era4 is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.
Skills Required
- Experience in a Personal Assistant, Executive Assistant, or similar role, ideally supporting multiple senior leaders.
- Outstanding organisational skills and ability to manage competing demands in a fast-paced environment.
- Proactive, solutions-focused mindset with initiative and ownership.
- Excellent attention to detail, follow-through, and accuracy.
- Clear, confident written and verbal communication skills.
- Sound judgement, discretion, and reliability when handling confidential information.
- Strong Microsoft 365 skills, particularly Outlook, Word, PowerPoint, and Excel.
- SharePoint experience.
- Flexibility to coordinate with a US-based executive outside standard UK working hours when necessary.
What We Do
Carbon3.ai is building the UK’s sovereign AI platform – secure, sustainable, and designed for real-world impact. AI growth demands are creating new challenges and compute power requirements are outpacing supply. At Carbon3.ai, we’re not just providing infrastructure, we’re building the foundations to overcome these challenges. We are an energy business transforming into the UK’s sovereign choice for AI. Vertically integrated from soil to software transforming legacy industrial sites into renewable powered AI data hubs. Designed, owned, and operated by Carbon3.ai, all infrastructure and data processing are located within the UK and fully subject to UK jurisdiction and regulatory oversight. We generate our own off-grid renewable power, providing low-cost, sustainable energy comparable to Nordic levels, making AI workloads both affordable and sustainable. We own 50+ sites across the UK and are rapidly scaling them into AI data centres, enabling high-density, low-latency, sovereign AI deployment at national scale. Whether you're training models, deploying intelligent agents, or building industry-specific solutions, Carbon3.ai accelerates your journey from concept to production. Backed by strategic partnerships with leading brands and robust investment, we’re building the infrastructure to power the UK’s most ambitious AI innovation – ensuring British enterprises can access world-class AI capabilities securely and sustainably.







